Cisco Systems 7500 Series manual Pin Signal Direction Signal Description

Chapter 1 Cisco 7500 Series Product Overview

Route Switch Processor Overview

Table 1-13	RSP Console Port Pinout
Pin	Signal Direction	Signal Description
1	–	Ground (GND)
2	<—	Transmit Data (TxD)
3	—>	Receive Data RxD)
6	—>	Data Set Ready (DSR); always on
7	–	Ground (GND)
8	—>	Data Carrier Detect (DCD); always on

RSP Auxiliary Port Pinout

The auxiliary port on the RSP is an EIA/TIA-232 DTE DB-25 plug to which you can attach external equipment in order to access the router from the network. The Request To Send (RTS) signal tracks the state of the Clear To Send (CTS) input. The auxiliary port supports hardware flow control and modem control. Table 1-14lists the auxiliary port pinout.

Table 1-14	RSP Auxiliary Port Pinout
	Signal
Pin	Direction	Signal Description
2	—>	Transmit Data (TxD)
3	<—	Receive Data (RxD)
4	—>	Request To Send (RTS); used for hardware flow control
5	<—	Clear To Send (CTS); used for hardware flow control
6	<—	Data Set Ready (DSR)
7	–	Signal Ground
8	<—	Carrier Detect (CD); used for modem control
20	—>	Data Terminal Ready (DTR); used for modem control only

RSP2, RSP4/4+, and RSP8 Console and Auxiliary Y-Cable Pinouts

The console and auxiliary Y-cables allow you to simultaneously connect the console or auxiliary ports on two RSP2s, two RSP4/4+s, two RSP8s or one of each, to one console terminal or external auxiliary device (such as a modem, and so forth). These are configured as system master and slave in RSP slots 2 and 3 in the Cisco 7507 and Cisco 7507-MX, and RSP slots 6 and 7 in the Cisco 7513 and Cisco 7513-MX.

Note The Cisco 7576 does not support master/slave configuration. In the Cisco 7576, the RSP in slot 6 is automatically the system master for router A and the RSP in slot 7 is automatically the system master for router B. The use of Y-cables is not supported on the Cisco 7576, and they are not included with the unit.

The two Y-cables ship with the Cisco 7507, Cisco 7507-MX, Cisco 7513, and Cisco 7513-MX chassis as Product Numbers CAB-RSP2CON and CAB-RSP2AUX, and are available as spare parts (=).

	Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0		1-45